摘要
在电磁法探测方法中脉冲类噪声严重地影响了阻抗响应参数的稳定估计,消除这类噪声的干扰是数据处理的首要任务。由于噪声的脉冲性质使得传统的频率域方法无能为力,文章利用小波变换的能量聚焦特性,据小波变换的模极大值特性,在时频域中搜索奇异点的位置并采用线性预测技术来消除脉冲类噪声的影响,取得很好的效果,实测数据处理结果也显示本文的方法是有效可靠的。
Owing to progress and development of modern civilization, impulse -like noise seriously affects steady estimation of impedance response parameter in the electromagnetic exploration. It is the first task of data processing to remove noise interference. Traditional frequency domain method has powerless because of impulse character of noise. Using features of energy focusing and maximum characteristic of module in the wavelet domain, method removing impulse - like noise with linearity prediction and searching locality of singularity point in the time - frequency domain has got great effects. Processing results of practice data also show that the method is reliable.
出处
《地质与勘探》
CAS
CSCD
北大核心
2008年第3期75-78,共4页
Geology and Exploration
基金
国家自然科学基金(编号:60272072)资助
关键词
小波分析
时间序列
天然电磁场
去噪
wavelet analysis, time serial, nature electromagnetic field, de - noise
